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Learn Model Context Protocol with Python
Learn Model Context Protocol with Python

Learn Model Context Protocol with Python: Build agentic systems in Python with the new standard for AI capabilities

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Profile Icon Christoffer Noring
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$31.99 $35.99
eBook Oct 2025 304 pages 1st Edition
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Arrow left icon
Profile Icon Christoffer Noring
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$31.99 $35.99
eBook Oct 2025 304 pages 1st Edition
eBook
$31.99 $35.99
Paperback
$44.99
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Free Trial
Renews at $19.99p/m
eBook
$31.99 $35.99
Paperback
$44.99
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Free Trial
Renews at $19.99p/m

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Learn Model Context Protocol with Python

Explaining the Model Context Protocol

The MCP consists of many parts. In short, JavaScript Object Notation-Remote Procedure Call (JSON-RPC) messages are exchanged between the client and the server. A JSON-RPC message is a message following the JSON-RPC specification, which means it has the jsonrpc, id, method, and params fields, and the data type is JSON. An example could look like so:

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "doSomething",
  "params": {
    "foo": "bar"
  }
}

Quick tip: Enhance your coding experience with the AI Code Explainer and Quick Copy features. Open this book in the next-gen Packt Reader. Click the Copy button

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The next-gen Packt Reader is included for free with the purchase of this book. Scan...

Learning about the protocol by implementing it

Instead of making this a dry chapter about a protocol and its different messages, let’s make it enjoyable by actually talking about the processes and messages while implementing them. As part of explaining the process and its flows, you will be shown both the flows as diagrams and also implemented as code. Let’s begin.

Transports in MCP

The idea with transports in MCP is that they define how clients and servers communicate. MCP is transport agnostic, meaning it can work over HTTP, WebSockets, STDIO, and more. The transport is the layer that handles the underlying message exchange. It exchanges messages of type JSON-RPC.

MCP has a set of transports it supports from STDIO (for servers running locally) to streamable transports such as WebSockets and Server-Sent-Events (SSEs), and finally request/response transports such as HTTP.

For each of the specified transports, they all have in common that they operate on streams. All the transports have a method exposing those streams, like so:

async with anyio.create_task_group() as tg
    ...
    yield (read_stream, write_stream)

There’s also a BaseSession class that all transports use to send raw JSON-RPC messages, which looks like so.

class BaseSession(
    Generic[
        SendRequestT,
        SendNotificationT,
        SendResultT...

Summary

In this chapter, we covered quite a bit of information. The most important takeaway is that client and server communication needs to be initialized before further action can take place. Fortunately, most SDKs take care of the initialization part, and you can usually start the client-server communication by calling and listing tools and more. Hopefully, this was a good read for both those who find diagrams clarifying and those who like to see how code looks. The code works, but could surely be improved for performance, maintainability, and more. Do give the code a try – check the solutions folder.

In the next chapter, we will learn how to build and test our first server. The chapter will serve as a good introduction to getting hands-on with MCP.

Assignment

Try running the code provided in https://github.com/PacktPublishing/Learn-Model-Context-Protocol-with-Python/blob/main/Chapter02/Solutions/README.md to see how things work. The code should do the following:

  • Initialize a connection
  • Send an initialized notification
  • List tools
  • Call a tool and produce notifications
  • Produce sample messages

The code is built up in steps, so it’s worth going through all the subfolders for your chosen runtime.

Quiz

What needs to happen before a handshake between a server and a client can be considered complete?

  • A: The client needs to first send initialize, wait for the server response, and then send initialized.
  • B: The client and server can call, for example, list tools right away.
  • C: The client needs to send initialized to the server.

You can access the solution at https://github.com/PacktPublishing/Learn-Model-Context-Protocol-with-Python/blob/main/Chapter02/Solutions/solution-quiz.md.

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Key benefits

  • The only resource you'll need to build, test, and deploy MCP servers and clients
  • Take a modern approach toward building, testing, and securing distributed agentic AI apps
  • Get clear, professional guidance on developing for both LLM and non-LLM clients
  • Purchase of the print or Kindle book includes a free PDF eBook

Description

Learn Model Context Protocol with Python introduces developers, architects, and AI practitioners to the transformative capabilities of Model Context Protocol (MCP), an emerging protocol designed to standardize, distribute, and scale AI-driven applications. Through the lens of a practical project, the book tackles the modern challenges of resource management, client-server interaction, and deployment at scale. Drawing from Christoffer's expertise as a published author and tutor at the University of Oxford, you’ll explore the components of MCP and how they streamline server and client development. Next, you’ll progress from building robust backends and integrating LLMs into intelligent clients to interacting with servers via tools such as Claude for desktop and Visual Studio Code agents. The chapters help you understand how to describe the capabilities of hosts, clients, and servers, facilitating better interoperability, easier integration, and clearer communication between different components. The book also covers security best practices and building for the cloud, ensuring that you're ready to deploy your MCP-based apps. Each chapter enables you to develop hands-on skills for building and operating MCP-based agentic apps. The Python primer at the end rounds out the practical toolkit, making this book essential for any team building AI-native applications today.

Who is this book for?

This book is ideal for web developers, software architects, AI practitioners, and tech leads looking to build scalable AI-integrated applications using MCP. Product managers overseeing AI initiatives will also find this book valuable. A basic understanding of web development and AI concepts is needed to make the most of this book.

What you will learn

  • Understand the MCP protocol and its core components
  • Build MCP servers that expose tools and resources to a variety of clients
  • Test and debug servers using the interactive inspector tools
  • Consume servers using Claude Desktop and Visual Studio Code Agents
  • Secure MCP apps, as well as managing and mitigating common threats
  • Build and deploy MCP apps using cloud-based strategies

Product Details

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Last updated date : Oct 27, 2025
Publication date : Oct 27, 2025
Length: 304 pages
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Language : English
ISBN-13 : 9781806103225
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Last updated date : Oct 27, 2025
Publication date : Oct 27, 2025
Length: 304 pages
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Language : English
ISBN-13 : 9781806103225
Category :
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Tools :

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Table of Contents

15 Chapters
Introduction to the Model Context Protocol Chevron down icon Chevron up icon
Explaining the Model Context Protocol Chevron down icon Chevron up icon
Building and Testing Servers Chevron down icon Chevron up icon
Building SSE Servers Chevron down icon Chevron up icon
Streamable HTTP Chevron down icon Chevron up icon
Advanced Servers Chevron down icon Chevron up icon
Building Clients Chevron down icon Chevron up icon
Consuming Servers Chevron down icon Chevron up icon
Sampling Chevron down icon Chevron up icon
Elicitation Chevron down icon Chevron up icon
Securing Your Application Chevron down icon Chevron up icon
Bringing MCP Apps to Production Chevron down icon Chevron up icon
Unlock Your Book’s Exclusive Benefits Chevron down icon Chevron up icon
Other Books You May Enjoy Chevron down icon Chevron up icon
Index Chevron down icon Chevron up icon
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